2 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
3 <http://rt2x00.serialmonkey.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 Abstract: rt2x00 generic device routines.
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/slab.h>
31 #include "rt2x00lib.h"
34 * Radio control handlers.
36 int rt2x00lib_enable_radio(struct rt2x00_dev
*rt2x00dev
)
41 * Don't enable the radio twice.
42 * And check if the hardware button has been disabled.
44 if (test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
48 * Initialize all data queues.
50 rt2x00queue_init_queues(rt2x00dev
);
56 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_ON
);
60 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_ON
);
62 rt2x00leds_led_radio(rt2x00dev
, true);
63 rt2x00led_led_activity(rt2x00dev
, true);
65 set_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
);
70 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_ON
);
73 * Start the TX queues.
75 ieee80211_wake_queues(rt2x00dev
->hw
);
80 void rt2x00lib_disable_radio(struct rt2x00_dev
*rt2x00dev
)
82 if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
86 * Stop the TX queues in mac80211.
88 ieee80211_stop_queues(rt2x00dev
->hw
);
89 rt2x00queue_stop_queues(rt2x00dev
);
94 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_OFF
);
99 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_OFF
);
100 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_OFF
);
101 rt2x00led_led_activity(rt2x00dev
, false);
102 rt2x00leds_led_radio(rt2x00dev
, false);
105 void rt2x00lib_toggle_rx(struct rt2x00_dev
*rt2x00dev
, enum dev_state state
)
108 * When we are disabling the RX, we should also stop the link tuner.
110 if (state
== STATE_RADIO_RX_OFF
)
111 rt2x00link_stop_tuner(rt2x00dev
);
113 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, state
);
116 * When we are enabling the RX, we should also start the link tuner.
118 if (state
== STATE_RADIO_RX_ON
)
119 rt2x00link_start_tuner(rt2x00dev
);
122 static void rt2x00lib_intf_scheduled_iter(void *data
, u8
*mac
,
123 struct ieee80211_vif
*vif
)
125 struct rt2x00_dev
*rt2x00dev
= data
;
126 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
130 * Copy all data we need during this action under the protection
131 * of a spinlock. Otherwise race conditions might occur which results
132 * into an invalid configuration.
134 spin_lock(&intf
->lock
);
136 delayed_flags
= intf
->delayed_flags
;
137 intf
->delayed_flags
= 0;
139 spin_unlock(&intf
->lock
);
142 * It is possible the radio was disabled while the work had been
143 * scheduled. If that happens we should return here immediately,
144 * note that in the spinlock protected area above the delayed_flags
145 * have been cleared correctly.
147 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
150 if (delayed_flags
& DELAYED_UPDATE_BEACON
)
151 rt2x00queue_update_beacon(rt2x00dev
, vif
, true);
154 static void rt2x00lib_intf_scheduled(struct work_struct
*work
)
156 struct rt2x00_dev
*rt2x00dev
=
157 container_of(work
, struct rt2x00_dev
, intf_work
);
160 * Iterate over each interface and perform the
161 * requested configurations.
163 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
164 rt2x00lib_intf_scheduled_iter
,
169 * Interrupt context handlers.
171 static void rt2x00lib_beacondone_iter(void *data
, u8
*mac
,
172 struct ieee80211_vif
*vif
)
174 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
176 if (vif
->type
!= NL80211_IFTYPE_AP
&&
177 vif
->type
!= NL80211_IFTYPE_ADHOC
&&
178 vif
->type
!= NL80211_IFTYPE_MESH_POINT
&&
179 vif
->type
!= NL80211_IFTYPE_WDS
)
182 spin_lock(&intf
->lock
);
183 intf
->delayed_flags
|= DELAYED_UPDATE_BEACON
;
184 spin_unlock(&intf
->lock
);
187 void rt2x00lib_beacondone(struct rt2x00_dev
*rt2x00dev
)
189 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
192 ieee80211_iterate_active_interfaces_atomic(rt2x00dev
->hw
,
193 rt2x00lib_beacondone_iter
,
196 ieee80211_queue_work(rt2x00dev
->hw
, &rt2x00dev
->intf_work
);
198 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone
);
200 void rt2x00lib_txdone(struct queue_entry
*entry
,
201 struct txdone_entry_desc
*txdesc
)
203 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
204 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
205 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(entry
->skb
);
206 enum data_queue_qid qid
= skb_get_queue_mapping(entry
->skb
);
207 unsigned int header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
208 u8 rate_idx
, rate_flags
, retry_rates
;
209 u8 skbdesc_flags
= skbdesc
->flags
;
216 rt2x00queue_unmap_skb(rt2x00dev
, entry
->skb
);
219 * Remove the extra tx headroom from the skb.
221 skb_pull(entry
->skb
, rt2x00dev
->ops
->extra_tx_headroom
);
224 * Signal that the TX descriptor is no longer in the skb.
226 skbdesc
->flags
&= ~SKBDESC_DESC_IN_SKB
;
229 * Remove L2 padding which was added during
231 if (test_bit(DRIVER_REQUIRE_L2PAD
, &rt2x00dev
->flags
))
232 rt2x00queue_remove_l2pad(entry
->skb
, header_length
);
235 * If the IV/EIV data was stripped from the frame before it was
236 * passed to the hardware, we should now reinsert it again because
237 * mac80211 will expect the same data to be present it the
238 * frame as it was passed to us.
240 if (test_bit(CONFIG_SUPPORT_HW_CRYPTO
, &rt2x00dev
->flags
))
241 rt2x00crypto_tx_insert_iv(entry
->skb
, header_length
);
244 * Send frame to debugfs immediately, after this call is completed
245 * we are going to overwrite the skb->cb array.
247 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TXDONE
, entry
->skb
);
250 * Determine if the frame has been successfully transmitted.
253 test_bit(TXDONE_SUCCESS
, &txdesc
->flags
) ||
254 test_bit(TXDONE_UNKNOWN
, &txdesc
->flags
);
257 * Update TX statistics.
259 rt2x00dev
->link
.qual
.tx_success
+= success
;
260 rt2x00dev
->link
.qual
.tx_failed
+= !success
;
262 rate_idx
= skbdesc
->tx_rate_idx
;
263 rate_flags
= skbdesc
->tx_rate_flags
;
264 retry_rates
= test_bit(TXDONE_FALLBACK
, &txdesc
->flags
) ?
265 (txdesc
->retry
+ 1) : 1;
268 * Initialize TX status
270 memset(&tx_info
->status
, 0, sizeof(tx_info
->status
));
271 tx_info
->status
.ack_signal
= 0;
274 * Frame was send with retries, hardware tried
275 * different rates to send out the frame, at each
276 * retry it lowered the rate 1 step except when the
277 * lowest rate was used.
279 for (i
= 0; i
< retry_rates
&& i
< IEEE80211_TX_MAX_RATES
; i
++) {
280 tx_info
->status
.rates
[i
].idx
= rate_idx
- i
;
281 tx_info
->status
.rates
[i
].flags
= rate_flags
;
283 if (rate_idx
- i
== 0) {
285 * The lowest rate (index 0) was used until the
286 * number of max retries was reached.
288 tx_info
->status
.rates
[i
].count
= retry_rates
- i
;
292 tx_info
->status
.rates
[i
].count
= 1;
294 if (i
< (IEEE80211_TX_MAX_RATES
- 1))
295 tx_info
->status
.rates
[i
].idx
= -1; /* terminate */
297 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
299 tx_info
->flags
|= IEEE80211_TX_STAT_ACK
;
301 rt2x00dev
->low_level_stats
.dot11ACKFailureCount
++;
305 * Every single frame has it's own tx status, hence report
306 * every frame as ampdu of size 1.
308 * TODO: if we can find out how many frames were aggregated
309 * by the hw we could provide the real ampdu_len to mac80211
310 * which would allow the rc algorithm to better decide on
311 * which rates are suitable.
313 if (tx_info
->flags
& IEEE80211_TX_CTL_AMPDU
) {
314 tx_info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
315 tx_info
->status
.ampdu_len
= 1;
316 tx_info
->status
.ampdu_ack_len
= success
? 1 : 0;
319 if (rate_flags
& IEEE80211_TX_RC_USE_RTS_CTS
) {
321 rt2x00dev
->low_level_stats
.dot11RTSSuccessCount
++;
323 rt2x00dev
->low_level_stats
.dot11RTSFailureCount
++;
327 * Only send the status report to mac80211 when it's a frame
328 * that originated in mac80211. If this was a extra frame coming
329 * through a mac80211 library call (RTS/CTS) then we should not
330 * send the status report back.
332 if (!(skbdesc_flags
& SKBDESC_NOT_MAC80211
))
333 ieee80211_tx_status_irqsafe(rt2x00dev
->hw
, entry
->skb
);
335 dev_kfree_skb_irq(entry
->skb
);
338 * Make this entry available for reuse.
343 rt2x00dev
->ops
->lib
->clear_entry(entry
);
345 clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
346 rt2x00queue_index_inc(entry
->queue
, Q_INDEX_DONE
);
349 * If the data queue was below the threshold before the txdone
350 * handler we must make sure the packet queue in the mac80211 stack
351 * is reenabled when the txdone handler has finished.
353 if (!rt2x00queue_threshold(entry
->queue
))
354 ieee80211_wake_queue(rt2x00dev
->hw
, qid
);
356 EXPORT_SYMBOL_GPL(rt2x00lib_txdone
);
358 static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev
*rt2x00dev
,
359 struct rxdone_entry_desc
*rxdesc
)
361 struct ieee80211_supported_band
*sband
;
362 const struct rt2x00_rate
*rate
;
368 * For non-HT rates the MCS value needs to contain the
369 * actually used rate modulation (CCK or OFDM).
371 if (rxdesc
->dev_flags
& RXDONE_SIGNAL_MCS
)
372 signal
= RATE_MCS(rxdesc
->rate_mode
, rxdesc
->signal
);
374 signal
= rxdesc
->signal
;
376 type
= (rxdesc
->dev_flags
& RXDONE_SIGNAL_MASK
);
378 sband
= &rt2x00dev
->bands
[rt2x00dev
->curr_band
];
379 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
380 rate
= rt2x00_get_rate(sband
->bitrates
[i
].hw_value
);
382 if (((type
== RXDONE_SIGNAL_PLCP
) &&
383 (rate
->plcp
== signal
)) ||
384 ((type
== RXDONE_SIGNAL_BITRATE
) &&
385 (rate
->bitrate
== signal
)) ||
386 ((type
== RXDONE_SIGNAL_MCS
) &&
387 (rate
->mcs
== signal
))) {
392 WARNING(rt2x00dev
, "Frame received with unrecognized signal, "
393 "signal=0x%.4x, type=%d.\n", signal
, type
);
397 void rt2x00lib_rxdone(struct rt2x00_dev
*rt2x00dev
,
398 struct queue_entry
*entry
)
400 struct rxdone_entry_desc rxdesc
;
402 struct ieee80211_rx_status
*rx_status
= &rt2x00dev
->rx_status
;
403 unsigned int header_length
;
406 * Allocate a new sk_buffer. If no new buffer available, drop the
407 * received frame and reuse the existing buffer.
409 skb
= rt2x00queue_alloc_rxskb(rt2x00dev
, entry
);
416 rt2x00queue_unmap_skb(rt2x00dev
, entry
->skb
);
419 * Extract the RXD details.
421 memset(&rxdesc
, 0, sizeof(rxdesc
));
422 rt2x00dev
->ops
->lib
->fill_rxdone(entry
, &rxdesc
);
425 * The data behind the ieee80211 header must be
426 * aligned on a 4 byte boundary.
428 header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
431 * Hardware might have stripped the IV/EIV/ICV data,
432 * in that case it is possible that the data was
433 * provided separately (through hardware descriptor)
434 * in which case we should reinsert the data into the frame.
436 if ((rxdesc
.dev_flags
& RXDONE_CRYPTO_IV
) &&
437 (rxdesc
.flags
& RX_FLAG_IV_STRIPPED
))
438 rt2x00crypto_rx_insert_iv(entry
->skb
, header_length
,
440 else if (header_length
&&
441 (rxdesc
.size
> header_length
) &&
442 (rxdesc
.dev_flags
& RXDONE_L2PAD
))
443 rt2x00queue_remove_l2pad(entry
->skb
, header_length
);
445 rt2x00queue_align_payload(entry
->skb
, header_length
);
447 /* Trim buffer to correct size */
448 skb_trim(entry
->skb
, rxdesc
.size
);
451 * Check if the frame was received using HT. In that case,
452 * the rate is the MCS index and should be passed to mac80211
453 * directly. Otherwise we need to translate the signal to
454 * the correct bitrate index.
456 if (rxdesc
.rate_mode
== RATE_MODE_CCK
||
457 rxdesc
.rate_mode
== RATE_MODE_OFDM
) {
458 rate_idx
= rt2x00lib_rxdone_read_signal(rt2x00dev
, &rxdesc
);
460 rxdesc
.flags
|= RX_FLAG_HT
;
461 rate_idx
= rxdesc
.signal
;
465 * Update extra components
467 rt2x00link_update_stats(rt2x00dev
, entry
->skb
, &rxdesc
);
468 rt2x00debug_update_crypto(rt2x00dev
, &rxdesc
);
470 rx_status
->mactime
= rxdesc
.timestamp
;
471 rx_status
->rate_idx
= rate_idx
;
472 rx_status
->signal
= rxdesc
.rssi
;
473 rx_status
->flag
= rxdesc
.flags
;
474 rx_status
->antenna
= rt2x00dev
->link
.ant
.active
.rx
;
477 * Send frame to mac80211 & debugfs.
478 * mac80211 will clean up the skb structure.
480 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_RXDONE
, entry
->skb
);
481 memcpy(IEEE80211_SKB_RXCB(entry
->skb
), rx_status
, sizeof(*rx_status
));
482 ieee80211_rx_irqsafe(rt2x00dev
->hw
, entry
->skb
);
485 * Replace the skb with the freshly allocated one.
490 rt2x00dev
->ops
->lib
->clear_entry(entry
);
492 rt2x00queue_index_inc(entry
->queue
, Q_INDEX
);
494 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone
);
497 * Driver initialization handlers.
499 const struct rt2x00_rate rt2x00_supported_rates
[12] = {
501 .flags
= DEV_RATE_CCK
,
505 .mcs
= RATE_MCS(RATE_MODE_CCK
, 0),
508 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
512 .mcs
= RATE_MCS(RATE_MODE_CCK
, 1),
515 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
519 .mcs
= RATE_MCS(RATE_MODE_CCK
, 2),
522 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
526 .mcs
= RATE_MCS(RATE_MODE_CCK
, 3),
529 .flags
= DEV_RATE_OFDM
,
533 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 0),
536 .flags
= DEV_RATE_OFDM
,
540 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 1),
543 .flags
= DEV_RATE_OFDM
,
547 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 2),
550 .flags
= DEV_RATE_OFDM
,
554 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 3),
557 .flags
= DEV_RATE_OFDM
,
561 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 4),
564 .flags
= DEV_RATE_OFDM
,
568 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 5),
571 .flags
= DEV_RATE_OFDM
,
575 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 6),
578 .flags
= DEV_RATE_OFDM
,
582 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 7),
586 static void rt2x00lib_channel(struct ieee80211_channel
*entry
,
587 const int channel
, const int tx_power
,
590 entry
->center_freq
= ieee80211_channel_to_frequency(channel
);
591 entry
->hw_value
= value
;
592 entry
->max_power
= tx_power
;
593 entry
->max_antenna_gain
= 0xff;
596 static void rt2x00lib_rate(struct ieee80211_rate
*entry
,
597 const u16 index
, const struct rt2x00_rate
*rate
)
600 entry
->bitrate
= rate
->bitrate
;
601 entry
->hw_value
=index
;
602 entry
->hw_value_short
= index
;
604 if (rate
->flags
& DEV_RATE_SHORT_PREAMBLE
)
605 entry
->flags
|= IEEE80211_RATE_SHORT_PREAMBLE
;
608 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev
*rt2x00dev
,
609 struct hw_mode_spec
*spec
)
611 struct ieee80211_hw
*hw
= rt2x00dev
->hw
;
612 struct ieee80211_channel
*channels
;
613 struct ieee80211_rate
*rates
;
614 unsigned int num_rates
;
618 if (spec
->supported_rates
& SUPPORT_RATE_CCK
)
620 if (spec
->supported_rates
& SUPPORT_RATE_OFDM
)
623 channels
= kzalloc(sizeof(*channels
) * spec
->num_channels
, GFP_KERNEL
);
627 rates
= kzalloc(sizeof(*rates
) * num_rates
, GFP_KERNEL
);
629 goto exit_free_channels
;
632 * Initialize Rate list.
634 for (i
= 0; i
< num_rates
; i
++)
635 rt2x00lib_rate(&rates
[i
], i
, rt2x00_get_rate(i
));
638 * Initialize Channel list.
640 for (i
= 0; i
< spec
->num_channels
; i
++) {
641 rt2x00lib_channel(&channels
[i
],
642 spec
->channels
[i
].channel
,
643 spec
->channels_info
[i
].tx_power1
, i
);
647 * Intitialize 802.11b, 802.11g
651 if (spec
->supported_bands
& SUPPORT_BAND_2GHZ
) {
652 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_channels
= 14;
653 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_bitrates
= num_rates
;
654 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].channels
= channels
;
655 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].bitrates
= rates
;
656 hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] =
657 &rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
];
658 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].ht_cap
,
659 &spec
->ht
, sizeof(spec
->ht
));
663 * Intitialize 802.11a
665 * Channels: OFDM, UNII, HiperLAN2.
667 if (spec
->supported_bands
& SUPPORT_BAND_5GHZ
) {
668 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_channels
=
669 spec
->num_channels
- 14;
670 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_bitrates
=
672 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].channels
= &channels
[14];
673 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].bitrates
= &rates
[4];
674 hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] =
675 &rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
];
676 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].ht_cap
,
677 &spec
->ht
, sizeof(spec
->ht
));
684 ERROR(rt2x00dev
, "Allocation ieee80211 modes failed.\n");
688 static void rt2x00lib_remove_hw(struct rt2x00_dev
*rt2x00dev
)
690 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
691 ieee80211_unregister_hw(rt2x00dev
->hw
);
693 if (likely(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
])) {
694 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->channels
);
695 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->bitrates
);
696 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = NULL
;
697 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] = NULL
;
700 kfree(rt2x00dev
->spec
.channels_info
);
703 static int rt2x00lib_probe_hw(struct rt2x00_dev
*rt2x00dev
)
705 struct hw_mode_spec
*spec
= &rt2x00dev
->spec
;
708 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
712 * Initialize HW modes.
714 status
= rt2x00lib_probe_hw_modes(rt2x00dev
, spec
);
719 * Initialize HW fields.
721 rt2x00dev
->hw
->queues
= rt2x00dev
->ops
->tx_queues
;
724 * Initialize extra TX headroom required.
726 rt2x00dev
->hw
->extra_tx_headroom
=
727 max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM
,
728 rt2x00dev
->ops
->extra_tx_headroom
);
731 * Take TX headroom required for alignment into account.
733 if (test_bit(DRIVER_REQUIRE_L2PAD
, &rt2x00dev
->flags
))
734 rt2x00dev
->hw
->extra_tx_headroom
+= RT2X00_L2PAD_SIZE
;
735 else if (test_bit(DRIVER_REQUIRE_DMA
, &rt2x00dev
->flags
))
736 rt2x00dev
->hw
->extra_tx_headroom
+= RT2X00_ALIGN_SIZE
;
741 status
= ieee80211_register_hw(rt2x00dev
->hw
);
745 set_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
);
751 * Initialization/uninitialization handlers.
753 static void rt2x00lib_uninitialize(struct rt2x00_dev
*rt2x00dev
)
755 if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
759 * Unregister extra components.
761 rt2x00rfkill_unregister(rt2x00dev
);
764 * Allow the HW to uninitialize.
766 rt2x00dev
->ops
->lib
->uninitialize(rt2x00dev
);
769 * Free allocated queue entries.
771 rt2x00queue_uninitialize(rt2x00dev
);
774 static int rt2x00lib_initialize(struct rt2x00_dev
*rt2x00dev
)
778 if (test_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
782 * Allocate all queue entries.
784 status
= rt2x00queue_initialize(rt2x00dev
);
789 * Initialize the device.
791 status
= rt2x00dev
->ops
->lib
->initialize(rt2x00dev
);
793 rt2x00queue_uninitialize(rt2x00dev
);
797 set_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
);
800 * Register the extra components.
802 rt2x00rfkill_register(rt2x00dev
);
807 int rt2x00lib_start(struct rt2x00_dev
*rt2x00dev
)
811 if (test_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
815 * If this is the first interface which is added,
816 * we should load the firmware now.
818 retval
= rt2x00lib_load_firmware(rt2x00dev
);
823 * Initialize the device.
825 retval
= rt2x00lib_initialize(rt2x00dev
);
829 rt2x00dev
->intf_ap_count
= 0;
830 rt2x00dev
->intf_sta_count
= 0;
831 rt2x00dev
->intf_associated
= 0;
833 /* Enable the radio */
834 retval
= rt2x00lib_enable_radio(rt2x00dev
);
836 rt2x00queue_uninitialize(rt2x00dev
);
840 set_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
);
845 void rt2x00lib_stop(struct rt2x00_dev
*rt2x00dev
)
847 if (!test_and_clear_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
851 * Perhaps we can add something smarter here,
852 * but for now just disabling the radio should do.
854 rt2x00lib_disable_radio(rt2x00dev
);
856 rt2x00dev
->intf_ap_count
= 0;
857 rt2x00dev
->intf_sta_count
= 0;
858 rt2x00dev
->intf_associated
= 0;
862 * driver allocation handlers.
864 int rt2x00lib_probe_dev(struct rt2x00_dev
*rt2x00dev
)
866 int retval
= -ENOMEM
;
868 mutex_init(&rt2x00dev
->csr_mutex
);
870 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
873 * Make room for rt2x00_intf inside the per-interface
874 * structure ieee80211_vif.
876 rt2x00dev
->hw
->vif_data_size
= sizeof(struct rt2x00_intf
);
879 * Determine which operating modes are supported, all modes
880 * which require beaconing, depend on the availability of
883 rt2x00dev
->hw
->wiphy
->interface_modes
= BIT(NL80211_IFTYPE_STATION
);
884 if (rt2x00dev
->ops
->bcn
->entry_num
> 0)
885 rt2x00dev
->hw
->wiphy
->interface_modes
|=
886 BIT(NL80211_IFTYPE_ADHOC
) |
887 BIT(NL80211_IFTYPE_AP
) |
888 BIT(NL80211_IFTYPE_MESH_POINT
) |
889 BIT(NL80211_IFTYPE_WDS
);
892 * Let the driver probe the device to detect the capabilities.
894 retval
= rt2x00dev
->ops
->lib
->probe_hw(rt2x00dev
);
896 ERROR(rt2x00dev
, "Failed to allocate device.\n");
901 * Initialize configuration work.
903 INIT_WORK(&rt2x00dev
->intf_work
, rt2x00lib_intf_scheduled
);
906 * Allocate queue array.
908 retval
= rt2x00queue_allocate(rt2x00dev
);
913 * Initialize ieee80211 structure.
915 retval
= rt2x00lib_probe_hw(rt2x00dev
);
917 ERROR(rt2x00dev
, "Failed to initialize hw.\n");
922 * Register extra components.
924 rt2x00link_register(rt2x00dev
);
925 rt2x00leds_register(rt2x00dev
);
926 rt2x00debug_register(rt2x00dev
);
931 rt2x00lib_remove_dev(rt2x00dev
);
935 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev
);
937 void rt2x00lib_remove_dev(struct rt2x00_dev
*rt2x00dev
)
939 clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
944 rt2x00lib_disable_radio(rt2x00dev
);
949 cancel_work_sync(&rt2x00dev
->intf_work
);
952 * Uninitialize device.
954 rt2x00lib_uninitialize(rt2x00dev
);
957 * Free extra components
959 rt2x00debug_deregister(rt2x00dev
);
960 rt2x00leds_unregister(rt2x00dev
);
963 * Free ieee80211_hw memory.
965 rt2x00lib_remove_hw(rt2x00dev
);
968 * Free firmware image.
970 rt2x00lib_free_firmware(rt2x00dev
);
973 * Free queue structures.
975 rt2x00queue_free(rt2x00dev
);
977 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev
);
980 * Device state handlers
983 int rt2x00lib_suspend(struct rt2x00_dev
*rt2x00dev
, pm_message_t state
)
985 NOTICE(rt2x00dev
, "Going to sleep.\n");
988 * Prevent mac80211 from accessing driver while suspended.
990 if (!test_and_clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
994 * Cleanup as much as possible.
996 rt2x00lib_uninitialize(rt2x00dev
);
999 * Suspend/disable extra components.
1001 rt2x00leds_suspend(rt2x00dev
);
1002 rt2x00debug_deregister(rt2x00dev
);
1005 * Set device mode to sleep for power management,
1006 * on some hardware this call seems to consistently fail.
1007 * From the specifications it is hard to tell why it fails,
1008 * and if this is a "bad thing".
1009 * Overall it is safe to just ignore the failure and
1010 * continue suspending. The only downside is that the
1011 * device will not be in optimal power save mode, but with
1012 * the radio and the other components already disabled the
1013 * device is as good as disabled.
1015 if (rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_SLEEP
))
1016 WARNING(rt2x00dev
, "Device failed to enter sleep state, "
1017 "continue suspending.\n");
1021 EXPORT_SYMBOL_GPL(rt2x00lib_suspend
);
1023 int rt2x00lib_resume(struct rt2x00_dev
*rt2x00dev
)
1025 NOTICE(rt2x00dev
, "Waking up.\n");
1028 * Restore/enable extra components.
1030 rt2x00debug_register(rt2x00dev
);
1031 rt2x00leds_resume(rt2x00dev
);
1034 * We are ready again to receive requests from mac80211.
1036 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1040 EXPORT_SYMBOL_GPL(rt2x00lib_resume
);
1041 #endif /* CONFIG_PM */
1044 * rt2x00lib module information.
1046 MODULE_AUTHOR(DRV_PROJECT
);
1047 MODULE_VERSION(DRV_VERSION
);
1048 MODULE_DESCRIPTION("rt2x00 library");
1049 MODULE_LICENSE("GPL");